Applied Research On Joint Exploration Of Active Source And Passive Source Surface Wave

Surface wave exploration is a new engineering geophysical exploration technology developed rapidly in the past years.Because of its low cost,convenient operation and high accuracy,it is widely favored by many survey units and is widely applied in engineering engineering investigation.Based on the current development and application requirements of surface wave exploration,this paper expounds the basic theory of surface wave and its dispersion characteristics in uniform half space,two layers of medium and multi-layer medium,and the theoretical basis and characteristics of exploration for active source surface wave and passive source surface wave exploration.The research of dual source surface wave exploration technology is carried out.The collection arrangement,acquisition parameters and data processing of active source surface wave are systematically analyzed,and the source of rammer is introduced to carry out the expansion research.The comparison of the data signal in source of the rammer and source of the hammer is carried out,and the extraction method and content of the data collection and frequency dispersion curve are analyzed,and the field detection and analysis is carried out with the engineering example.Then the layout of the passive source surface wave and the key technology in the signal processing are summarized systematically,in which the later data processing and the extraction of the frequency dispersion curve are systematically studied to lay the foundation for the subsequent joint exploration.According to the comparison and analysis of field experiments,the advantages of dual source surface waves are combined to carry out the attempt of joint exploration of surface waves.According to the comparison and analysis of field experiments,the advantages of dual source surface waves are combined to carry out the attempt of joint exploration of surface waves.By using the same arrangement to collect the data of active source and passive source surface wave,and try to carry out the superposition of the frequency dispersion spectrum of the same arrangement,improve the quality of the frequency dispersion curve,and complement the advantages of the two source in order to improve the improve the accuracy and depth of the exploration in surface wave method.Through the development of double source surface wave exploration test show that better application of joint exploration of active source and passive source in shallow exploration in effect,can be combined with a certain degree of two advantages,enhance the exploration depth and superficial resolution,greatly enhance the exploration abilityof single method,to provide theoretical guidance for practical engineering the surface wave exploration.